POSS-based adsorbent for heavy metal ions and thiol-ene click chemistry preparation method

A heavy metal ion and adsorbent technology, which is applied in the fields of environmental protection and material science, can solve the problems of low exchange capacity, generally around tens of milligrams per gram, secondary pollution, etc., and achieve simple and efficient process and saturated adsorption capacity High and stable adsorption performance

Inactive Publication Date: 2019-09-10
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The principle of the precipitation method is simple, but the efficiency is low, and it is easy to introduce other impurities to cause secondary pollution; the ion exchange method has the problems of poor selectivity and low exchange capacity; the adsorption materials used in the adsorption method are usually cheap and easy to obtain, and the removal rate of metal ions is high. and is widely used
However, the performance of common adsorbents such as activated carbon, tourmaline, zeolite, biosorbent, etc. (such as low adsorption capacity, generally around tens of milligrams per gram; long adsorption time, generally takes several hours to several days) has been unable to meet New needs of social and economic development and high requirements of environmental protection

Method used

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  • POSS-based adsorbent for heavy metal ions and thiol-ene click chemistry preparation method
  • POSS-based adsorbent for heavy metal ions and thiol-ene click chemistry preparation method
  • POSS-based adsorbent for heavy metal ions and thiol-ene click chemistry preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0022] At room temperature, dissolve 2.0g octavinyl POSS in 30mL tetrahydrofuran, then add 3.34g 2-methyl-5-mercapto-1,3,4-thiadiazole and 0.02g 2,2-dimethoxy 2-phenyl acetophenone, put the mixed solution at a wavelength of 365nm and a light intensity of 20mW / cm 2 Under high ultraviolet light, react for 30 minutes under magnetic stirring, and then evaporate and concentrate the mixed solution to obtain a crude product. The crude product was precipitated in methanol, the supernatant was removed by centrifugation, repeated 3 times, and then the precipitate was placed in a drying oven at 60°C and vacuum dried for 12 hours to obtain a POSS-based heavy metal ion adsorbent (4.80g).

Embodiment 2

[0024] At room temperature, dissolve 2.0g octavinyl POSS in 30mL tetrahydrofuran, then add 6.68g 2-methyl-5-mercapto-1,3,4-thiadiazole and 0.02g 2,2-dimethoxy 2-phenyl acetophenone, put the mixed solution at a wavelength of 365nm and a light intensity of 20mW / cm 2 Under high ultraviolet light, react for 30 minutes under magnetic stirring, and then evaporate and concentrate the mixed solution to obtain a crude product. The crude product was precipitated in methanol, the supernatant was removed by centrifugation, repeated 3 times, and then the precipitate was placed in a drying oven at 60°C and vacuum dried for 12 hours to obtain a POSS-based heavy metal ion adsorbent (5.20g)

Embodiment 3

[0026] At room temperature, dissolve 2.0g octavinyl POSS in 30mL tetrahydrofuran, then add 4.2g 2-methyl-5-mercapto-1,3,4-thiadiazole and 0.02g 2,2-dimethoxy 2-phenyl acetophenone, put the mixed solution at a wavelength of 365nm and a light intensity of 20mW / cm 2 Under high ultraviolet light, react for 30 minutes under magnetic stirring, and then evaporate and concentrate the mixed solution to obtain a crude product. Precipitate the crude product in methanol, remove the supernatant by centrifugation, repeat 3 times, then put the precipitate in a drying oven at 60°C and vacuum dry for 12 hours to obtain POSS-based heavy metal ion adsorbent (5.16g)

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Abstract

The invention discloses a POSS-based adsorbent for heavy metal ions and a preparation method of the adsorbent, and belongs to the fields of environmental protection and material science. The adsorbenthas a structure represented by a formula (I) shown in the description. The preparation method comprises the following steps: performing a thiol-ene click chemistry reaction by using octavinyloctasilasesquioxane and mercaptothiadiazole as raw materials at room temperature to obtain the POSS-based adsorbent having the characteristics of the structure represented by the formula (I) for the heavy metal ions. The method provided by the invention is simple, high-efficiency, green and controllable, has mild reaction conditions, a simple treatment process, and discards a noble metal catalyst (such asa metal platinum catalyst) or complicated and harsh reaction conditions used in preparation of an adsorbent in the prior art; and the obtained adsorbent has the advantages of a fast adsorption speed,high saturated adsorption capacity and stable adsorption performance.

Description

Technical field [0001] The invention belongs to the fields of environmental protection and material science, and specifically relates to a POSS-based heavy metal ion adsorbent and a method for preparing mercaptoene click chemistry. Background technique [0002] With the rapid economic development of our country, the environmental pollution caused by the large amount of waste water containing heavy metal ions produced in the chemical, mining, metallurgy, petroleum and other industries has seriously endangered the sustainable development of social economy and human health. Therefore, the research related to the treatment of heavy metal ions in the environment has attracted wide attention from domestic and foreign scholars. At present, the methods for processing heavy metal ions mainly include chemical and physical precipitation, ion exchange and adsorption. The principle of precipitation method is simple, but the efficiency is low, and other impurities are easily introduced to cau...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F101/20
CPCB01J20/22C02F1/285C02F2101/20
Inventor 夏勇丁莎邓银燕艾建军黄思敏邱洁刘跃军
Owner HUNAN UNIV OF TECH
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